Nasogastric suction pump



United States Patent [72] lnventors Georgy Maximovich Datscnko [56]References Cited U fl Lfllilll UNITED STATES PATENTS 'b 1,735,28711/1929 Lehmann 128/356 2470 665 5/1949 Stiehl 128/276 A LNO- 631 022 P2,931,309 4/1960 Bower 103/44x [22] Filed Apr. 14,1967

22 1970 2,941,530 6/1960 Laub 128/219 [451 3,058,473 10/1962 Whitehead.128/349 3,087,493 4/1963 Schossow 128/351 3,168,092 2/1965 Silvermanl28/2X Primary Examiner-Richard A. Gaudet o m Assistant Examiner-Kyle L.Howell [s4] 1 hgzg g PUMP ,Attomey-Waters, Roditi, Schwartz & Nissen[52] 11.8. 128/2,

128/278, 128/351 ABSTRACT: A nasoabomasum probe provided with a hollowelastic hose having a flexible tube mounted inside thereof cl 10/00capable of longitudinal displacement and carrying an elastic [50] FieldSearch 128/2,276, inflatable bulb overlapping the remote end portion ofsaid 278, 218, 219, 281, 356, 349, 351, 223; 103/148, 158, 44( D); 1l9/(lnquired) tube, the other end of the tube being connected to adevice for inflating said bulb.

NASOGASTRIC SUCTION PUMP proved to be successful only when applied fortreatment of animals having an unilocular stomach. In cases whereruminants are involved, use has hitherto been made of gastric probesalready known in the art which can be employed for penetrating only intothe rumen and the reticulum. This to a great extent lowers the effect oftreatment since no possibility is provided for obtaining objective dataon how the abomasum functions nor can its function be restored to anormal level by introducing the appropriate medicinal substancesimmediately into the abomasum.

As it can be seen from the abovesaid, the secretory function of theabomasum is examined heretofore solely through fistulization of testanimals and not in clinical practice.

lt is therefore the primary object of this invention to eliminate theaforesaid disadvantages of the known probes.

It is a further and more specific object of this invention to provide aprobe and a method of its application whereby the probe can penetratethrough the nasal passage into the esophagus wherefrom it can bedirected optionally either to the abomasum or to the rumen of theanimal. This is accomplished by providing an elastic inflatable bulbsecured at the inlet end of a flexible tube whereas the other end ofsaid tube communicates with a means for inflating said bulb in thecapacity of which an injection syringe can be used.

Other objects and advantages of the invention will become apparent fromthe following description and the accompanying drawing the sole figureof which is an elevation view partly in section of the nasogastric probeof the present invention.

Referring to the drawing, said probe comprises an elastic hose 1 and aflexible tube 2 capable of being inserted thereinto, the inlet end ofsaid flexible t'ube carrying an elastic inflatable bulb 3 made fastthereto whereas the other end of said tube communicates with aninjection syringe 4. To facilitate inserting of the flexible tube 2along with the bulb 3 into the elastic hose 1, said bulb is fitted ontosaid flexible tube somewhat away from its edge and is then fastenedthereon.

The rear end of the flexible tube 2 communicates via a twoway valve 5with the syringe 4 and a tube 6, the latter being intended tocommunicate with either a Marey's capsule or a pressure gauge (not shownin the drawing).

A ring 7 fits loosely on the hose 1.

To bring the probe in operative position, the flexible tube 2 with thebulb 3 and the syringe 4 joined thereto, is inserted into the elastichose 1 of the probe so that the end of the tube 2 carrying the bulb 3 issomewhat extended from the hose 1 and locked in that position with aclamp 8.

The scale of the syringe 4 indicates the amount of air filling theelastic bulb 3. When the bulb 3 increases its volume so as to exceed thediameter of the elastic hose 1, the probe end takes the form of anelastic olive which facilitates the progressing of the probe through thenasal passages into the esophagus and further on through the omasumcanal to the abomasum. An increase of the elastic bulb 3 to the size ofan alimentary bolus when the probe end reaches the pharynx causes theanimal to swallow the probe whereby the latter penetrates into theesophagus. The fact that the volume of the elastic bulb 3 is increasedthrough inflation enables the probe while passing through the esophagusto be directed to the rumen. After the probe has been introduced intothe abomasum, the flexible tube 2 carrying the elastic bulb 3 is pulledthrough the hose, whereby the contents of the abomasum are drawn off,this action being based on the suction principle.

The present method of introduction of the probe is based upon thebiological features peculiar to ruminants and resides in that when theprobe is introduced into the abomasum of an animal, the reflex closingof the esophagus occurs after the sensory receptors located in the oralcavity and the pharynx have been irritated by food stimuli.

After the animal to be treated has been fixed in place, the necessarylength of the probe is found by way of measuring the distance from theanimals nostril to the point of intersection of the costal arch with thehorizontal line produced from the patella, whereupon the ring 7 is setto the length found. Further, the volume of the elastic bulb 3 isincreased through inflation so that it becomes larger than the outerdiameter of the elastic hose 1. Then the probe is introduced through thelower nasal passage of the animal. When the inlet end of the probereaches the pharynx, the volume of the elastic bulb 3 is increased oncemore so as to assume the size of an alimentary bolus whereupon theanimal performs swallowing movements and the probe penetrates into theesophagus. When the probe progresses down the esophagus the volume ofthe elastic bulb 3 is reduced. The further movement of the probe isdiscontinued before it reaches the vestibulum of the rumen. Juvenileanimals are given a nipple drinker filled with milk which is introducedinto their oral cavity. As to the adult animals, some food stimuli areintroduced perorally through a slender rubber tube into the buccalspace. After the animal has made two or three swallows, the probe isadvanced further until reaching the preset mark (the ring 7) on theelastic hose 1, the food stimuli being introduced continuously into thebuccal space. Thereupon the flexible tube 2 with the bulb is pulled outfrom the hose, the contents of the abomasum are drawn off and theappropriate curing manipulations are carried out.

As the food stimulus for juvenile animals use is made of milk whereasfor adult animals solutions of some substances capable of stimulatingthe gustatory analyzers, located in the animals oral cavity and thepharynx, can be used for the purpose, such as 25 percent solutions ofsodium sulfate and magnesium sulfate, 10 percent solutions of sodiumchloride or sugar, and the like.

Application of the nasogastric probe .of the present invention makes itpossible to obtain the contents of the abomasum without fistulization ofthe animal as well as to investigate the secretory function of theabomasum by using the fractionation method. The probe allows theintroduction of drugs im mediately into the abomasum, makes possibleirrigation of the abomasum as well as recording of its functionalcharacteristics.

We claim:

1. A nasogastric probe comprising an elastic hose with an inner passage;a hollow flexible tube disposed with clearance in the passage of saidelastic hose such that the tube can be displaced longitudinally insidethe passage of said hose; an elastic inflatable bulb secured to saidflexible tube and overlapping the remote end portion of the latter; andmeans for inflating said bulb connected to the nearest end portion ofsaid flexible tube; said elastic bulb when inflated extending from saidhose and having a size providing for a closure of the clearance betweensaid flexible tube and the hose when the probe is being introduced, saidflexible tube having a portion extending from the hose to the inflatingmeans, and clamp means fitted on said portion of the flexible tube whichextends from the hose and engaging the hose at the end face thereof forpreventing the flexible tube from being pulled out of the hose in thecourse of probe introduction.

2. A probe as claimed in claim 1 comprising a ring on said elastic hoseadjustable lengthwise thereof for limiting the depth of insertion of theprobe.

